Nut-lock



No. 6l7,0l5. Patented Ian. 3, I899 T. HARDING.

NUT LOOK.

(Application filed July 6, 1898.! (No Model.)

WITNESSES JNVENTOR Aitarneys m: NORRIS PETERS novv PHOTO-LUNG"wawmuromo. c.

FFIGEt THOMAS HARDING, OF SAN JOSE, CALIFORNIA.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 617,015, dated January3, 1899.

Application filed July e, 1893.

To all whom zit may concern:

Be it known that I, THOMAS HARDING, a citizen of the United States ofAmerica, residing at San Jos, in the county of Santa Clara and State ofCalifornia, have invented certain new and useful Improvements in Nut-Locks; and I do herebydeclare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

This invent-ion is an improvement in nutlocks, the object of the samebeing to provide a device of this character which shall be simple andcheap in construction and durable and effective in use, forming a strongand firm lock that is readily and conveniently applied to an ordinarybolt and nut without requiring any alteration thereof.

Having the above objects in View, the invention contemplates theproduction of a lockwasher comprising an annular plate cut or slit toform two projecting spring-tongues, the ends of which are beveled at anangle to engage the corners of the nut and bear flatly against theopposite sides of said nut, said washer also having lugs or spurs at theinner ends of the concentric slits, said lugs being swaged or struckfrom the washer and projecting from the under side thereof to engage theobject through which the bolt is passed, forming a strong and durableconnection that will prevent the washer from turning in eitherdirection.

The following specification enters into a detail description of theinvention, reference bein g had to the accompanying drawings, and toletters thereon, which designate the different parts, and what isclaimed as new in the art is more particularly set forth in the appendedclaim.

In the drawings, Figure l is an elevation showing the application of theinvention to a railroad-joint. Fig. 2 is an inverted plan view,enlarged, of the improved lock-washer which constitutes the invention.Fig. 3 is an edge View of said washer. Fig. t is a sectional view on theline 4 4 of Fig. 2.

Referring more particularly to said drawings, wherein like letters ofreference refer to like parts throughout the several views, A designatesthe threaded bolt, and B the nut Serial No. 685,272. (No model.)

which is turned thereon, these parts being of the ordinary constructionand illustrated herein to show the application of the invention.

0 designates the improved look-washer, which in use is slipped upon thebolt A in ad Vance of screwing the nut B thereon, and in carrying out myinvention or improvement upon washers of similar design the said washeror annular plate C is provided at opposite sides with a slit (Z, locatedadjoining the periphery of the washer and joined at one end by atangential slit d, forming tongues D D, which are bent or sprung upwardso that the free ends thereof will lie normally above the upper surfaceof said washer. These tongues extend in the same direction around thewasher, and the terminals or free ends project only sufficiently to forma shoulder or stop, which contacts with the opposite corners of the nutand prevents backward rotation thereof.

From the under side of the washer or annular plate 0 project lugs orspurs E, which are stamped or swaged from the plate and are conical inshape, the said conical lugs or spurs being located at the inner end ofthe concentric slit d to reinforce the same.

In use the lock-washer is placed upon the bolt with the tongues Dprojecting outward and the lugs or spurs E inward, after which the nutis placed upon the bolt and screwed down upon said washer,and in casethe washer bears against a wooden object or beam the spurs will beforced thereinto during the operation of turning the nut, the corners ofthe latter riding over the tongues D to be engaged thereby and preventedfrom backward rotation.

In the event of the device being used in con nection with a metal partor fish-plate, as shown in the drawings, the said metal part is providedwith an indentation to receive the spurs or lugs, the said indentationbeing made by a prick-punch.

. I am aware that it has been proposed to form a lock-washer havingprojecting tongues and opposite spurs, the latter being bent from thewasher, also to provide a lock-washer with projecting spurs swayedtherefrom; but with the particular construction of my improvedlock-washer a better engagement is had both with the nut and objectconnected by the bolt and nut, for by locating the lugs or spurs at theinner ends of the slits the latter are reinforced, while both ends ofthe tongues are so beveled that they are parallel with each other andbear flatly against the opposite sides of the nut and consequentlyoppose a lateral strain or tension. It will be noted, therefore, that Iprovide a lock washer which is very strong and durable and alsopossesses the important advantage of being cheap in construction, asthey can be manufactured at a minimum cost or but a little more than theordinary plain washer.

Having thus particularly described my invention and set forth theadvantages attained by the particular construction of detail parts, whatI claim to be new, and desire to protect by Letters Patent, is

In a nu t-lock, the combination with the nut 13, of a lock-washer 0having concentric slits d at opposite sides adjoining the periphery andtangential slits cl extending from the periphery and connecting with oneend of the aforesaid slits, forming spring-tongues D with ends which arebeveled as shown and so disposed as to bear flatly against oppositesides of the nut; and spurs swaged from the washer at the inner ends ofthe concentric slits to project from the inner side of said washer, asherein shown and for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

THOMAS HARDING.

WVitnesses:

D. D. TENNYSON, J. A. FAIROHILD.

